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Lens Specifications

Design Wavelength	1550 nm	Magnification	Infinite
Numerical Aperture	0.3	Window Thickness	0.275 mm
Clear Aperture	4.50 mm	Laser Window Material / Index	N-BK7/1.5
Effective Focal Length	7.5 mm	Glass	H-LAK54
Working Distance	5.90 mm	Surface Quality	60-40 Scratch-Dig(Entire Bulk Material)

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A375-A
A375TM-A

Vd number	51.05
CTE (10-6 / °C)	5.2
Thermo optic coefficient (10-6 / °C) (Δn/ΔT)	6.7

Surface R(mm) A4 A6 A8

ASP(1) 94.7 - - -

ASP(2) 5.15 -0.000506996 -1.01365e-005 -8.52327e-007

Side 1 and Side 2 are labeled as ASP1 and ASP2, respectively, on the drawings shown on the Specifications tab.

z	SAG as a Function of Y	A4	4th Order Aspheric Coefficient
R	Radius of Curvature	A6	6th Order Aspheric Coefficient
k	Conic Constant	A8	8th Order Aspheric Coefficient
A2	2nd Order Aspheric Coefficient	An	nth Order Aspheric Coefficient